I received an email with a 30% off any camera in store only coupon today from Staples. This would translate into $450 less 30% for the SX50 ($315) and of course if you are lucky enough to find the SX40 it would be less.

This is with coupon for regular or sale prices and expires on the 8th.

There are also some amazing prices at Target on many Canon point and shoots. A1300 for $60 -in store only price (ends on the 8th), A2300 for $70 or $80 in store (sorry but I don't remember the exact price) and A4000 for $10 more than the 2300.